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Exam Details

JEE MAIN 2021 ONLINE 27TH AUGUST EVENING SHIFT

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Questions 90
Duration 180 mins
Package IIT-JEE Main - Previous Year Papers

Paper pattern & analysis

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Showing all 90 questions in this paper.

Subject distribution

Physics
30 Qs
Chemistry
30 Qs
Mathematics
30 Qs

Topic distribution

Algebra
15 Qs
Mechanics
14 Qs
Inorganic Chemistry
11 Qs
Organic Chemistry
10 Qs
Electricity
9 Qs
Physical Chemistry
9 Qs
Calculus
8 Qs
Modern Physics
5 Qs
Coordinate Geometry
4 Qs
Trigonometry
3 Qs
Optics
2 Qs

Subtopic distribution

Current Electricity
3 Qs
Matrices And Determinants
3 Qs
3D Geometry
3 Qs
Heat And Thermodynamics
3 Qs
Electronic Devices
2 Qs
Environmental Chemistry
2 Qs
Differential Equations
2 Qs
Probability
2 Qs
Circle
2 Qs
Aldehydes Ketones And Carboxylic Acids
2 Qs
Thermodynamics
2 Qs
Units And Measurements
2 Qs

Difficulty distribution

Medium 52 57.8%
Easy 36 40%
Hard 2 2.2%

Question type distribution

Multiple Choices 60 66.7%
Numerical Answer Type (NAT) 30 33.3%

Syllabus

Full Syllabus

Sample questions from this paper

Questions are selected across the paper subjects wherever the paper contains that variety.

1
2021 · Physics · Modern Physics · Communication Systems
JEE MAIN 2021 ONLINE 27TH AUGUST EVENING SHIFT
An antenna is mounted on a 400 m tall building. What will be the wavelength of signal that can be radiated effectively by the transmission tower upto a range of 44 km?
A
37.8 m
B
605 m
C
75.6 m
D
302 m
2
2021 · Chemistry · Physical Chemistry · Surface Chemistry
JEE MAIN 2021 ONLINE 27TH AUGUST EVENING SHIFT
Lyophilic sols are more stable than lyophobic sols because :
A
there is a strong electrostatic repulsion between the negatively charged colloidal particles.
B
the colloidal particles have positive charge.
C
the colloidal particles have no charge.
D
the colloidal particles are solvated.
3
2021 · Mathematics · Trigonometry · Height And Distance
JEE MAIN 2021 ONLINE 27TH AUGUST EVENING SHIFT
Two poles, AB of length a metres and CD of length a + b (b \(\ne\) a) metres are erected at the same horizontal level with bases at B and D. If BD = x and tan\(\angle\)ACB = \({1 \over 2}\), then :
A
x2 + 2(a + 2b)x \(-\) b(a + b) = 0
B
x2 + 2(a + 2b)x + a(a + b) = 0
C
x2 \(-\) 2ax + b(a + b) = 0
D
x2 \(-\) 2ax + a(a + b) = 0
4
2021 · Physics · Electricity · Current Electricity
JEE MAIN 2021 ONLINE 27TH AUGUST EVENING SHIFT
The Colour coding on a carbon resistor is shown in the given figure. The resistance value of the given resistor is :

JEE Main 2021 (Online) 27th August Evening Shift Physics - Current Electricity Question 204 English
A
(5700 \(\pm\) 285) \(\Omega\)
B
(7500 \(\pm\) 750) \(\Omega\)
C
(5700 \(\pm\) 375) \(\Omega\)
D
(7500 \(\pm\) 375) \(\Omega\)
5
2021 · Chemistry · Inorganic Chemistry · Isolation Of Elements
JEE MAIN 2021 ONLINE 27TH AUGUST EVENING SHIFT
Match List-I with List-II :

List - I
(Name of ore/mineral)		 List - II
(Chemical formula)
(a) Calmine (i) $$Zns$$
(b) Malachite (ii) $$FeC{O_3}$$
(c) Siderite (iii) $$ZnC{O_3}$$
(d) Sphalerite (iv) $$CuC{O_3}.Cu{(OH)_2}$$


Choose the most appropriate answer from the options given below :
A
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
B
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
C
(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
D
(a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
6
2021 · Mathematics · Algebra · Matrices And Determinants
JEE MAIN 2021 ONLINE 27TH AUGUST EVENING SHIFT
Let A(a, 0), B(b, 2b + 1) and C(0, b), b \(\ne\) 0, |b| \(\ne\) 1, be points such that the area of triangle ABC is 1 sq. unit, then the sum of all possible values of a is :
A
\({{ - 2b} \over {b + 1}}\)
B
\({{2b} \over {b + 1}}\)
C
\({{2{b^2}} \over {b + 1}}\)
D
\({{ - 2{b^2}} \over {b + 1}}\)